Jr. Marciante et Gp. Agrawal, CONTROLLING FILAMENTATION IN BROAD-AREA SEMICONDUCTOR-LASERS AND AMPLIFIERS, Applied physics letters, 69(5), 1996, pp. 593-595
We show that with the introduction of a new pair of epitaxial layers,
sandwiched between the active and cladding regions; self-defocusing ca
a play an important role in stabilizing the lateral mode in broad-area
semiconductor lasers and amplifiers. Under certain conditions, it can
be used to eliminate filamentation and provide a nearly flat mode pro
file by adjusting the band gap of the new self-defocusing layers. We d
iscuss the use of a strained multiple-quantum-well laser for producing
such a stable lateral mode. (C) 1996 American Institute of Physics.